She takes a big inhalation and holds it and he tears open the envelope and onto his palm slides a little quarter-inch seed clasped by a pale brown wing. “A mature Bosnian pine,” he whispers, “can grow thirty meters high and produce tens of thousands of cones a year. They can withstand ice and snow, high winds, pollution. Folded inside that seed is a whole wilderness.”

He brings the seed close to her lips and grins.

“Not yet.”

The seed almost seems to tremble in anticipation.

“Now.”

She exhales; the seed takes flight. Father and daughter watch it sail above the crowded racks. She loses track as it flutters toward the front of the room, then spies it as it settles among the cucumbers.

Konstance pinches it between two fingers, and unclips the seed from its wing. He helps her poke a hole in the gel membrane of an empty tray; she presses the seed in.

“It’s like we’re putting it to sleep,” she says, “but really we’re waking it up.”

Beneath his big white eyebrows Father’s eyes shine. He bundles her beneath an aeroponic table, crawls in beside her, and asks Sybil to dim the lights (plants eat light, Father says, but even plants can overeat). She pulls her blanket to her chin, and presses her head against her father’s chest as shadows fall over the room, and listens to his heart thrum inside his worksuit, and to conduits hum inside the walls, and to water drip from the long white threads of thousands of rootlets, down through the tiers of plants, into channels beneath the floor where it is collected to be resprayed once more, and the Argos hurtles another ten thousand kilometers through the emptiness.

“Will you tell some more of the story, Father?”

“It’s late, Zucchini.”

“Just the part when the witch changes herself into an owl. Please?”

“All right. But only that.”

“Also the part where Aethon turns into a donkey.”

“Fine. But then sleep.”

“Then sleep.”

“And you won’t tell Mother.”

“And I won’t tell Mother. I promise.”

Father and daughter smile, playing their familiar game, and Konstance wriggles inside her blanket, anticipation rolling through her, and the roots drip, and it is as if they drowse together inside the digestive system of a huge and gentle beast.

She says, “Aethon had just arrived in Thessaly, Land of Magic.”

“Right.”

“But he didn’t see any statues come to life or witches flying over rooftops.”